This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 14 |
| 10 | 99 |
| 11 | 459 |
| 12 | 1714 |
| 13 | 5270 |
| 14 | 14401 |
| 15 | 36907 |
| 16 | 86696 |
| 17 | 194306 |
| 18 | 414660 |
| 19 | 849564 |
| 20 | 1681744 |
| 21 | 3230120 |
| 22 | 6034046 |